Definition
Elastic Load Balance (ELB) is a service that automatically distributes incoming traffic across multiple backend Elastic Cloud Servers (ECSs) based on predefined forwarding policies. ELB can expand the access handling capability of application systems through traffic distribution and achieve a higher level of fault tolerance and performance. ELB also improves system availability by eliminating single point of failures (SPOFs).
In addition, ELB provides the standard OpenStack API and supports unified deployment across internal and external networks as well as access through Virtual Private Network (VPN) and direct connections and across Virtual Private Clouds (VPCs). Additionally, in the Region Type I scenario, FusionCloud supports active/standby Virtual Router Redundancy Protocol (VRRP) deployment.
You can create a load balancer on a web-based console and configure ECSs and service monitoring ports.
Functions
ELB provides a way to configure load balancing capability. A self-service web-based console is provided for you to easily configure the service and quickly spin up more capacity for load balancing.
ELB provides the following functions:
- Linear scaling and zero SPOFs
- Load balancing over TCP, UDP, HTTPS, and HTTP in the Region Type I scenario
- Load balancing over TCP and HTTP in the Region Type II scenario
- Access through VPN, intranet, and Internet
